232 lines
7.0 KiB
Diff
232 lines
7.0 KiB
Diff
--- a/include/net/netns/ipv6.h
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+++ b/include/net/netns/ipv6.h
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@@ -55,6 +55,7 @@ struct netns_ipv6 {
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unsigned long ip6_rt_last_gc;
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#ifdef CONFIG_IPV6_MULTIPLE_TABLES
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struct rt6_info *ip6_prohibit_entry;
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+ struct rt6_info *ip6_failed_policy_entry;
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struct rt6_info *ip6_blk_hole_entry;
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struct fib6_table *fib6_local_tbl;
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struct fib_rules_ops *fib6_rules_ops;
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--- a/include/uapi/linux/fib_rules.h
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+++ b/include/uapi/linux/fib_rules.h
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@@ -64,6 +64,10 @@ enum {
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FR_ACT_BLACKHOLE, /* Drop without notification */
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FR_ACT_UNREACHABLE, /* Drop with ENETUNREACH */
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FR_ACT_PROHIBIT, /* Drop with EACCES */
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+ FR_ACT_RES9,
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+ FR_ACT_RES10,
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+ FR_ACT_RES11,
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+ FR_ACT_FAILED_POLICY, /* Drop with EPERM */
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__FR_ACT_MAX,
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};
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--- a/include/uapi/linux/rtnetlink.h
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+++ b/include/uapi/linux/rtnetlink.h
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@@ -203,6 +203,7 @@ enum {
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RTN_THROW, /* Not in this table */
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RTN_NAT, /* Translate this address */
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RTN_XRESOLVE, /* Use external resolver */
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+ RTN_FAILED_POLICY, /* Failed ingress/egress policy */
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__RTN_MAX
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};
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--- a/net/ipv4/fib_rules.c
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+++ b/net/ipv4/fib_rules.c
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@@ -84,6 +84,10 @@ static int fib4_rule_action(struct fib_r
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err = -EACCES;
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goto errout;
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+ case FR_ACT_FAILED_POLICY:
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+ err = -EPERM;
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+ goto errout;
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+
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case FR_ACT_BLACKHOLE:
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default:
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err = -EINVAL;
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--- a/net/ipv4/fib_semantics.c
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+++ b/net/ipv4/fib_semantics.c
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@@ -138,6 +138,10 @@ const struct fib_prop fib_props[RTN_MAX
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.error = -EINVAL,
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.scope = RT_SCOPE_NOWHERE,
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},
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+ [RTN_FAILED_POLICY] = {
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+ .error = -EPERM,
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+ .scope = RT_SCOPE_UNIVERSE,
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+ },
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};
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static void rt_fibinfo_free(struct rtable __rcu **rtp)
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--- a/net/ipv4/fib_trie.c
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+++ b/net/ipv4/fib_trie.c
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@@ -2331,6 +2331,7 @@ static const char *const rtn_type_names[
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[RTN_THROW] = "THROW",
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[RTN_NAT] = "NAT",
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[RTN_XRESOLVE] = "XRESOLVE",
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+ [RTN_FAILED_POLICY] = "FAILED_POLICY",
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};
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static inline const char *rtn_type(char *buf, size_t len, unsigned int t)
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--- a/net/ipv4/ipmr.c
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+++ b/net/ipv4/ipmr.c
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@@ -181,6 +181,7 @@ static int ipmr_rule_action(struct fib_r
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case FR_ACT_UNREACHABLE:
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return -ENETUNREACH;
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case FR_ACT_PROHIBIT:
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+ case FR_ACT_FAILED_POLICY:
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return -EACCES;
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case FR_ACT_BLACKHOLE:
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default:
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--- a/net/ipv6/fib6_rules.c
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+++ b/net/ipv6/fib6_rules.c
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@@ -73,6 +73,9 @@ static int fib6_rule_action(struct fib_r
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err = -EACCES;
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rt = net->ipv6.ip6_prohibit_entry;
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goto discard_pkt;
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+ case FR_ACT_FAILED_POLICY:
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+ rt = net->ipv6.ip6_failed_policy_entry;
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+ goto discard_pkt;
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}
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table = fib6_get_table(net, rule->table);
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--- a/net/ipv6/ip6mr.c
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+++ b/net/ipv6/ip6mr.c
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@@ -166,6 +166,8 @@ static int ip6mr_rule_action(struct fib_
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return -ENETUNREACH;
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case FR_ACT_PROHIBIT:
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return -EACCES;
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+ case FR_ACT_FAILED_POLICY:
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+ return -EPERM;
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case FR_ACT_BLACKHOLE:
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default:
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return -EINVAL;
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--- a/net/ipv6/route.c
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+++ b/net/ipv6/route.c
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@@ -252,6 +252,24 @@ static const struct rt6_info ip6_prohibi
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.rt6i_ref = ATOMIC_INIT(1),
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};
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+static int ip6_pkt_failed_policy(struct sk_buff *skb);
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+static int ip6_pkt_failed_policy_out(struct sk_buff *skb);
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+
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+static const struct rt6_info ip6_failed_policy_entry_template = {
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+ .dst = {
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+ .__refcnt = ATOMIC_INIT(1),
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+ .__use = 1,
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+ .obsolete = DST_OBSOLETE_FORCE_CHK,
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+ .error = -EPERM,
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+ .input = ip6_pkt_failed_policy,
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+ .output = ip6_pkt_failed_policy_out,
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+ },
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+ .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP),
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+ .rt6i_protocol = RTPROT_KERNEL,
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+ .rt6i_metric = ~(u32) 0,
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+ .rt6i_ref = ATOMIC_INIT(1),
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+};
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+
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static const struct rt6_info ip6_blk_hole_entry_template = {
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.dst = {
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.__refcnt = ATOMIC_INIT(1),
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@@ -1583,6 +1601,9 @@ int ip6_route_add(struct fib6_config *cf
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case RTN_THROW:
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rt->dst.error = -EAGAIN;
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break;
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+ case RTN_FAILED_POLICY:
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+ rt->dst.error = -EPERM;
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+ break;
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default:
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rt->dst.error = -ENETUNREACH;
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break;
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@@ -2162,6 +2183,17 @@ static int ip6_pkt_prohibit_out(struct s
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return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
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}
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+static int ip6_pkt_failed_policy(struct sk_buff *skb)
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+{
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+ return ip6_pkt_drop(skb, ICMPV6_POLICY_FAIL, IPSTATS_MIB_INNOROUTES);
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+}
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+
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+static int ip6_pkt_failed_policy_out(struct sk_buff *skb)
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+{
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+ skb->dev = skb_dst(skb)->dev;
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+ return ip6_pkt_drop(skb, ICMPV6_POLICY_FAIL, IPSTATS_MIB_OUTNOROUTES);
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+}
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+
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#endif
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/*
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@@ -2368,7 +2400,8 @@ static int rtm_to_fib6_config(struct sk_
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if (rtm->rtm_type == RTN_UNREACHABLE ||
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rtm->rtm_type == RTN_BLACKHOLE ||
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rtm->rtm_type == RTN_PROHIBIT ||
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- rtm->rtm_type == RTN_THROW)
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+ rtm->rtm_type == RTN_THROW ||
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+ rtm->rtm_type == RTN_FAILED_POLICY)
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cfg->fc_flags |= RTF_REJECT;
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if (rtm->rtm_type == RTN_LOCAL)
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@@ -2570,6 +2603,9 @@ static int rt6_fill_node(struct net *net
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case -EACCES:
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rtm->rtm_type = RTN_PROHIBIT;
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break;
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+ case -EPERM:
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+ rtm->rtm_type = RTN_FAILED_POLICY;
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+ break;
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case -EAGAIN:
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rtm->rtm_type = RTN_THROW;
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break;
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@@ -2820,6 +2856,8 @@ static int ip6_route_dev_notify(struct n
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#ifdef CONFIG_IPV6_MULTIPLE_TABLES
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net->ipv6.ip6_prohibit_entry->dst.dev = dev;
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net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev);
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+ net->ipv6.ip6_failed_policy_entry->dst.dev = dev;
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+ net->ipv6.ip6_failed_policy_entry->rt6i_idev = in6_dev_get(dev);
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net->ipv6.ip6_blk_hole_entry->dst.dev = dev;
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net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev);
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#endif
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@@ -3080,6 +3118,17 @@ static int __net_init ip6_route_net_init
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net->ipv6.ip6_blk_hole_entry->dst.ops = &net->ipv6.ip6_dst_ops;
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dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst,
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ip6_template_metrics, true);
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+
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+ net->ipv6.ip6_failed_policy_entry =
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+ kmemdup(&ip6_failed_policy_entry_template,
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+ sizeof(*net->ipv6.ip6_failed_policy_entry), GFP_KERNEL);
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+ if (!net->ipv6.ip6_failed_policy_entry)
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+ goto out_ip6_blk_hole_entry;
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+ net->ipv6.ip6_failed_policy_entry->dst.path =
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+ (struct dst_entry *)net->ipv6.ip6_failed_policy_entry;
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+ net->ipv6.ip6_failed_policy_entry->dst.ops = &net->ipv6.ip6_dst_ops;
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+ dst_init_metrics(&net->ipv6.ip6_failed_policy_entry->dst,
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+ ip6_template_metrics, true);
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#endif
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net->ipv6.sysctl.flush_delay = 0;
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@@ -3098,6 +3147,8 @@ out:
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return ret;
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#ifdef CONFIG_IPV6_MULTIPLE_TABLES
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+out_ip6_blk_hole_entry:
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+ kfree(net->ipv6.ip6_blk_hole_entry);
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out_ip6_prohibit_entry:
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kfree(net->ipv6.ip6_prohibit_entry);
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out_ip6_null_entry:
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@@ -3115,6 +3166,7 @@ static void __net_exit ip6_route_net_exi
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#ifdef CONFIG_IPV6_MULTIPLE_TABLES
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kfree(net->ipv6.ip6_prohibit_entry);
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kfree(net->ipv6.ip6_blk_hole_entry);
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+ kfree(net->ipv6.ip6_failed_policy_entry);
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#endif
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dst_entries_destroy(&net->ipv6.ip6_dst_ops);
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}
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@@ -3211,6 +3263,9 @@ int __init ip6_route_init(void)
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init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
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init_net.ipv6.ip6_blk_hole_entry->dst.dev = init_net.loopback_dev;
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init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
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+ init_net.ipv6.ip6_failed_policy_entry->dst.dev = init_net.loopback_dev;
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+ init_net.ipv6.ip6_failed_policy_entry->rt6i_idev =
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+ in6_dev_get(init_net.loopback_dev);
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#endif
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ret = fib6_init();
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if (ret)
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